212 GEOEGE JOHN EOMANES I88I- 



lutely identical with, that in last editions of ' Origin ' 

 and ' Descent,' with, perhaps, a ' tendency ' to lay 

 more stress on levelling influence of Panmixia. 



Be physiological selection. I have sent Correvon, 

 of G-eneva, £50 to help in founding a garden in the 

 Alps, which wiU have the proud distinction of being 

 the highest garden in the world. He is a splendid 

 man for his knowledge of Alpine flora, and besides, is 

 strongly bitten with a desire to test physiological selec- 

 tion. Of course I shall do the hybridising experiments 

 myself, but he will collect the material from the 

 different mountains — i.e. nearly allied species, topo- 

 graphically separated, and therefore, I hope, mutually 

 fertile. The converse experiments of nearly aUied 

 species on common areas may be tried in England. 



I am making arrangements for repeating on an 

 extensive scale experiments on budding purple labur- 

 num on yellow, to see if it is possible to reproduce 

 ' Adam's eye ' hybrid. If so, it would now be of more 

 importance than ever in relation to Weismann. By 

 the way, he is sorely put to it in the case of plants 

 which reproduce themselves not only by cuttings, but 

 even by leaves. Here he is bound to confess that his 

 germ-plasma occupies all the cellular tissue of the 

 entire plant. But if so, how in the world does his 

 germ-plasma differ from gemmules ? 



There ! I did not intend to write you anything 

 of a letter when I began, but have gone on and on 

 till it is well for you that the second sheet is coming 

 to an end. 



Yours ever, 



G. J. EoMANES. 



